Home / 89,840.20-134,565.90-79,990.60

Finding the Fourth Proportional to 89,840.20, 134,565.90 and 79,990.60

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Solution

The fourth proportional to 89,840.20, 134,565.90 and 79,990.60 is: 119,812.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,840.20 : 134,565.90 = 79,990.60 : x
  2. Step 2: Convert to fraction form
    89,840.20/134,565.90 = 79,990.60/x
  3. Step 3: Cross multiply
    89,840.20x = 134,565.90 × 79,990.60
  4. Step 4: Simplify right side
    89,840.20x = 10,764,007,080.54
  5. Step 5: Solve for x
    x = 10,764,007,080.54/89,840.20
  6. Step 6: Final answer
    x = 119,812.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.